Thomas Sand Formation

Operator-reported tops from 2,021 wells across 8 counties, median tops running 902–2,309 ft by county.

Top depth: 685 ft 1,721 ft

295 wells shown (sampled from 2,021)

Depth by County

County	Wells	Median Top	Typical Range	CSV
Wichita	815	1,460 ft	1,200–1,684	↓
Archer	765	1,120 ft	745–1,410	↓
Clay	328	1,125 ft	1,061–1,175	↓
Wilbarger	67	1,680 ft	1,627–1,764	↓
Young	25	902 ft	640–1,004	↓
Baylor	8	1,255 ft	1,203–1,497	↓
Montague	7	1,390 ft	1,058–1,438	↓
Colorado	6	2,309 ft	2,290–2,330	↓

Counties with fewer than 5 wells omitted. Depths are measured depth as filed; typical range is the 10th–90th percentile of reported tops — raw filings contain occasional typo depths, so extremes are not shown.